More news on this day
Nashville and Denver are emerging as standout winners in a new phase of US international air service growth, as mid-continent hubs race coastal gateways to secure long haul routes, airline investments, and global connectivity.
Get the latest news straight to your inbox!
Mid-Continent Cities Step Into the Global Spotlight
Once overshadowed by coastal gateways, US interior cities are increasingly central to airlines’ international network strategies. Publicly available data on passenger volumes show that Denver International Airport ranked third in the United States for enplanements in 2024, while Nashville International Airport entered the top 30 and continues to post some of the country’s fastest growth rates.
Federal Aviation Administration figures indicate that Denver handled about 40 million passenger enplanements in 2024, a gain of more than 5 percent year over year. Nashville, though much smaller, recorded more than 12 million enplanements and grew by more than 7 percent, outpacing many larger hubs.
This rising demand is giving carriers more confidence to add and sustain long haul routes from non-coastal airports. Network planners increasingly view places like Denver and Nashville not only as domestic connections, but as efficient platforms to funnel traffic from smaller US markets onto transatlantic and transborder flights.
As a result, the race to secure new international links has expanded beyond traditional giants such as New York, Chicago, and Los Angeles. A widening field of US cities, from Austin and Raleigh to Nashville and Denver, is competing to lock in new global routes before aircraft and crews are committed elsewhere.
Denver Builds a Dense Transatlantic and Transborder Network
Denver has emerged as one of the clearest examples of this shift. According to airport publications summarizing 2024 activity, Denver International’s network reached 31 nonstop international destinations in 17 countries last year, with plans to expand to 33 destinations in 18 countries in 2025, the most in the airport’s history.
New and recent long haul additions include links to major European capitals and hubs. United Airlines has announced a seasonal nonstop Denver–Rome service operating in summer 2025, joining existing services from carriers such as British Airways to London Heathrow, Air France to Paris Charles de Gaulle, Aer Lingus to Dublin, Edelweiss to Zurich, Icelandair to Reykjavik and Turkish Airlines to Istanbul. Tourism and convention industry reports also highlight Aer Lingus’ entry to Denver and expanded service from other foreign carriers.
This wave of new routes builds on Denver’s role as one of the busiest connecting hubs in North America. Airport reports on 2023 and 2024 performance show record passenger totals and note that a large share of travelers are using Denver as a transfer point between US domestic flights and international services. That connecting traffic underpins long haul routes that might not be viable on local demand alone.
Looking ahead, Denver’s published route map indicates further near term additions to sun and leisure markets in the Caribbean and Latin America, alongside incremental capacity increases on established transatlantic services. The breadth of global connectivity now on offer from Denver positions the city as a serious rival to traditional coastal hubs for both leisure and business travelers across the US interior.
Nashville Quietly Expands Its International Reach
Nashville is advancing from a different starting point but with similarly strong momentum. Once known almost exclusively as a domestic point-to-point market, the airport now advertises a growing list of nonstop international destinations, including Toronto and Montreal in Canada, London Heathrow in the United Kingdom and seasonal routes to popular leisure markets.
Recent announcements underscore how quickly that picture is changing. In late 2024, Nashville International Airport reported that Air Canada would significantly expand service for summer 2025, adding a new three-times-weekly Vancouver route and increasing Montreal from four weekly flights to twice daily, while also boosting capacity on twice-daily Toronto service. The airport’s own destination listings confirm that these Canadian routes now anchor a steadily deepening transborder network.
FAA statistics place Nashville among the fastest-growing large US airports, with passenger enplanements rising more than 7 percent in 2024, compared with around 5 to 6 percent growth at many peer hubs. That growth is supported by a strong presence of low cost and full service carriers, and by rising demand from the city’s tourism, convention, healthcare and music industries.
Industry and local business reports also point to active efforts to secure additional nonstop links to Europe. Public coverage in 2024 indicated that airport leaders were close to finalizing a second transatlantic service, following the launch of British Airways’ Nashville–London Heathrow route, though specific carriers and destinations had not yet been formally announced.
A Broader US Contest for Long Haul Connectivity
Nashville and Denver are part of a broader contest among US cities to attract limited long haul aircraft and international traffic flows. Data compiled from federal and industry sources show that airports such as Austin, Raleigh–Durham, San Diego, and Kansas City have all pursued new nonstop services to Europe, Canada, Mexico and the Caribbean in the past few seasons.
One reason is the rapid rebound of international travel, which has created opportunities for secondary and interior hubs to complement capacity constrained coastal airports. Airlines are also deploying new, more fuel efficient narrowbody and midsize widebody aircraft that make longer “thin” routes viable from cities that previously could not support them.
At the same time, many regional airports and economic development organizations are offering incentives, marketing support and revenue guarantees to secure new international routes. Public records from communities across the Mountain West and Southeast show a willingness to underwrite new links to large hubs such as Denver, Dallas, Atlanta and Nashville, betting that improved connectivity will drive tourism and investment.
In that environment, airports that can demonstrate sustained passenger growth, diversified airline presence and strong local economic fundamentals are rising to the top of airlines’ lists. Denver and Nashville both meet those tests, which helps explain why their international networks are expanding quickly relative to many competitors.
What Rising International Profiles Mean for Travelers
For travelers across the central United States, the growing international profiles of Nashville and Denver translate into more options and shorter total journey times. Residents of secondary and tertiary markets can increasingly connect through these hubs instead of flying first to coastal cities, trimming hours from long haul itineraries.
Denver’s expanded transatlantic and transborder offerings provide new one stop links from across the Rocky Mountain West to Europe, the Middle East and the Caribbean. Similarly, Nashville’s deepening Canadian and European connectivity offers more convenient routings for travelers from across the mid South, including parts of Kentucky, Alabama and Mississippi.
The competitive impact is also significant. Additional international capacity from interior hubs can ease pressure on fares and give travelers more choice among alliances, schedules and onboard products. Public schedules and fare data already show a wider spread of departure times and price points on key transatlantic days of week from cities like Denver than was available just a few years ago.
As airlines finalize network plans for 2026 and beyond, observers expect the competition for new long haul routes to intensify. If current trends in passenger growth and carrier interest continue, Nashville and Denver appear well positioned to remain central players in America’s race for international flight growth.
FAA Passenger Enplanement Statistics
Denver International Airport 2024 Milestones